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Diffstat (limited to 'engines/wintermute/base/base_dynamic_buffer.cpp')
| -rw-r--r-- | engines/wintermute/base/base_dynamic_buffer.cpp | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/engines/wintermute/base/base_dynamic_buffer.cpp b/engines/wintermute/base/base_dynamic_buffer.cpp new file mode 100644 index 0000000000..fc48e93c2b --- /dev/null +++ b/engines/wintermute/base/base_dynamic_buffer.cpp @@ -0,0 +1,204 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +/* + * This file is based on WME Lite. + * http://dead-code.org/redir.php?target=wmelite + * Copyright (c) 2011 Jan Nedoma + */ + +#include "engines/wintermute/base/base_engine.h" +#include "engines/wintermute/base/base_dynamic_buffer.h" + +namespace Wintermute { + +////////////////////////////////////////////////////////////////////////// +BaseDynamicBuffer::BaseDynamicBuffer(BaseGame *inGame, uint32 initSize, uint32 growBy) { + _buffer = NULL; + _size = 0; + _realSize = 0; + + _offset = 0; + _initSize = initSize; + _growBy = growBy; + + _initialized = false; +} + + +////////////////////////////////////////////////////////////////////////// +BaseDynamicBuffer::~BaseDynamicBuffer() { + cleanup(); +} + + +////////////////////////////////////////////////////////////////////////// +void BaseDynamicBuffer::cleanup() { + if (_buffer) { + free(_buffer); + } + _buffer = NULL; + _size = 0; + _realSize = 0; + _offset = 0; + _initialized = false; +} + + +////////////////////////////////////////////////////////////////////////// +uint32 BaseDynamicBuffer::getSize() { + return _size; +} + + +////////////////////////////////////////////////////////////////////////// +bool BaseDynamicBuffer::init(uint32 initSize) { + cleanup(); + + if (initSize == 0) { + initSize = _initSize; + } + + _buffer = (byte *)malloc(initSize); + if (!_buffer) { + BaseEngine::LOG(0, "BaseDynamicBuffer::Init - Error allocating %d bytes", initSize); + return STATUS_FAILED; + } + + _realSize = initSize; + _initialized = true; + + return STATUS_OK; +} + + +////////////////////////////////////////////////////////////////////////// +bool BaseDynamicBuffer::putBytes(const byte *buffer, uint32 size) { + if (!_initialized) { + init(); + } + + while (_offset + size > _realSize) { + _realSize += _growBy; + _buffer = (byte *)realloc(_buffer, _realSize); + if (!_buffer) { + BaseEngine::LOG(0, "BaseDynamicBuffer::PutBytes - Error reallocating buffer to %d bytes", _realSize); + return STATUS_FAILED; + } + } + + memcpy(_buffer + _offset, buffer, size); + _offset += size; + _size += size; + + return STATUS_OK; +} + + +////////////////////////////////////////////////////////////////////////// +bool BaseDynamicBuffer::getBytes(byte *buffer, uint32 size) { + if (!_initialized) { + init(); + } + + if (_offset + size > _size) { + BaseEngine::LOG(0, "BaseDynamicBuffer::GetBytes - Buffer underflow"); + return STATUS_FAILED; + } + + memcpy(buffer, _buffer + _offset, size); + _offset += size; + + return STATUS_OK; +} + + +////////////////////////////////////////////////////////////////////////// +void BaseDynamicBuffer::putDWORD(uint32 val) { + putBytes((byte *)&val, sizeof(uint32)); +} + + +////////////////////////////////////////////////////////////////////////// +uint32 BaseDynamicBuffer::getDWORD() { + uint32 ret; + getBytes((byte *)&ret, sizeof(uint32)); + return ret; +} + + +////////////////////////////////////////////////////////////////////////// +void BaseDynamicBuffer::putString(const char *val) { + if (!val) { + putString("(null)"); + } else { + putDWORD(strlen(val) + 1); + putBytes((const byte *)val, strlen(val) + 1); + } +} + + +////////////////////////////////////////////////////////////////////////// +char *BaseDynamicBuffer::getString() { + uint32 len = getDWORD(); + char *ret = (char *)(_buffer + _offset); + _offset += len; + + if (!strcmp(ret, "(null)")) { + return NULL; + } else { + return ret; + } +} + + +////////////////////////////////////////////////////////////////////////// +void BaseDynamicBuffer::putText(const char *fmt, ...) { + va_list va; + + va_start(va, fmt); + putTextForm(fmt, va); + va_end(va); + +} + + +////////////////////////////////////////////////////////////////////////// +void BaseDynamicBuffer::putTextIndent(int indent, const char *fmt, ...) { + va_list va; + + putText("%*s", indent, ""); + + va_start(va, fmt); + putTextForm(fmt, va); + va_end(va); +} + + +////////////////////////////////////////////////////////////////////////// +void BaseDynamicBuffer::putTextForm(const char *format, va_list argptr) { + char buff[32768]; + vsprintf(buff, format, argptr); + putBytes((byte *)buff, strlen(buff)); +} + +} // end of namespace Wintermute |